The biotic factors that might cause annual fluctuations in the rate of photosynthesis in a grassland ecosystem are
Posted 3 years ago by gnya in Biology 20 | 0 answers
#energy and matter exchange in the biosphere
Posted 3 years ago by holly in Chemistry 30 | 1 answers
#chemistry 30
Calculate the displacement change (magnitude and direction) of the ball when it is moved from the initial to the final position given as follows.
Initial position: (xi, yi) = (-10.0 m, 10.0 m);
Final position: (xf, yf ) = (15.0 m, -20.0 m).
Posted 3 years ago by hahaha123 in Physics 20 | 0 answers
#physics
A box of cereal is pushed with an applied force of 2.4 N [W] across a table. If the cereal box has a mass of 2.5 kg and the box accelerates at 0.41 m/s2 [W], the coefficient of friction for the table top is _____. (Give your answer with correct number of significant digits)
Posted 3 years ago by Oxygen in Physics 20 | 0 answers
#physics
Vision is a complex process. The human eye has many structures that contribute to vision. Which of the following statements describing the structures involved in the process of vision is NOT correct?
Posted 3 years ago by vgdbhcjkd in Biology 30 | 1 answers
#biology 30
We regularly make conscious decisions to make specific muscular movements. For example, when using the touch interface of your phone, you make a conscious effort to scroll up and down the screen using your finger.
In contrast, there are many muscular movements that cannot be controlled voluntarily. For example, you cannot make your heart stop by thinking about it.
Which of the following statements correctly identifies the structures of the nervous system that are involved in triggering voluntary and involuntary actions, respectively?
Posted 3 years ago by rose in Biology 30 | 2 answers
#receptors
Olfactory cells → sensory neurons → olfactory bulb → occipital lobe
Posted 3 years ago by mzia12343 in Biology 30 | 2 answers
#biology 30
Use the following information to answer the next questions.
Atomic Masses of Select Isotopes
Isotope
Atomic Mass (u)
helium-3
3.016029
helium-4
4.002603
lead-208
207.976652
mercury-204
203.973467
polonium-212
211.988868
1.
a. What parent element decays into lead-208 by emitting an alpha particle? Show the nuclear reaction.
b. Calculate the energy released by this nuclear reaction.
c. What is the energy released per nucleon? Record your answer in MeV/nucleon.
Posted 3 years ago by in Physics 30 | 0 answers
#atomic physics
Find the energy equivalence of the mass of an electron.
Posted 3 years ago by in Physics 30 | 1 answers
#atomic physics
The average current produced by the cell in figure 2, when it operates for 30.0 min and consumes 1.00 g of the anode is Answer A
Posted 3 years ago by benb01864 in Chemistry 30 | 0 answers
#chemistry 30